Melatonin

• Helps increase total sleep time (aspect of sleep quality) in people with sleep restriction or altered sleep schedules, e.g., flextime work and jet lag.
• Helps relieve daytime fatigue associated with jet lag.
• Helps rebalance sleep-wake cycles (aspect of circadian rhythm).
• Helps reduce the time it takes to fall asleep (the sleep onset delay aspect of sleep quality) in people with delayed sleep phase syndrome.
  

Melatonin, a naturally occurring indolamine, is produced primarily in the pineal gland, but also in the bone marrow, platelets, gastrointestinal tract, eyes, skin, and lymphocytes of mammals. It plays a critical role in regulating the body's daily and annual biological rhythms, including the sleep-wake cycle. Research suggests that melatonin also supports antioxidant activity, cardiovascular health, and immune function.